Do you have to be a US citizen to be a senator?

No, not at all. Many former US Presidents never served as members of the US Congress. Some were military generals, and state governors. Examples include Bill Clinton (Governor of Arkansas), Ronald Reagan (Governor of California).

Section 1 of Article 2 of the U.S. Constitution states that a President must: * be a natural born citizen of the united States * be at least 35 years old * have lived in the U.S. for at least 14 years